Analysis of information sources in references of the Wikipedia article "Mainland Japan" in English language version.
一国の領土が数個に分かれている場合、憲法の定める通常の法律が行なわれる区域。旧憲法下の北海道、本州、四国、九州がこれにあたる。(The area established by the Constitution where common law applies, in cases where the territory of one country is divided into several portions. Under the old Japanese Constitution, this definition applied to the territories of Hokkaido, Honshu, Shikoku, and Kyushu).
MILT classification 6,852 islands(main islands: 5 islands, remote islands: 6,847 islands)
MILT classification 6,852 islands(main islands: 5 islands, remote islands: 6,847 islands)